//获取当前位置导航的方法
 openMap(){   
	 
						var vm = this;
			            var url = "";  
			            if (plus.os.name == "Android") {  
			                var hasBaiduMap = plus.runtime.isApplicationExist({pname:'com.baidu.BaiduMap',action:'baidumap://'});  
			                var hasAmap = plus.runtime.isApplicationExist({pname:'com.autonavi.minimap',action:'androidamap://'});  
			                var urlBaiduMap = "baidumap://map/marker?location="+ vm.endlat +","+ vm.endlng +"&title="+ vm.address +"&src=Hello%20uni-app";  
			                var urlAmap = "androidamap://viewMap?sourceApplication=Hello%20uni-app&poiname="+ vm.address +"&lat="+ vm.endlat +"&lon="+ vm.endlng +"&dev=0"  
			                if (hasAmap && hasBaiduMap) {  
			                    plus.nativeUI.actionSheet({title:"选择地图应用",cancel:"取消",buttons:[{title:"百度地图"},{title:"高德地图"}]}, function(e){  
			                        switch (e.index){  
			                            case 1:  
			                                plus.runtime.openURL(urlBaiduMap);  
			                                break;  
			                            case 2:  
			                                plus.runtime.openURL(urlAmap);  
			                                break;  
			                        }  
			                    })  
			                }  
			                else if (hasAmap) {  
			                    plus.runtime.openURL(urlAmap);  
			                }  
			                else if (hasBaiduMap) {  
			                    plus.runtime.openURL(urlBaiduMap);  
			                }  
			                else{  
			                    url = "geo:39.96310,116.340698?q=%e6%95%b0%e5%ad%97%e5%a4%a9%e5%a0%82";  
			                    plus.runtime.openURL(url); //如果是国外应用，应该优先使用这个，会启动google地图。这个接口不能统一坐标系，进入百度地图时会有偏差  
			                }  
			            } else{
			                // iOS上获取本机是否安装了百度高德地图，需要在manifest里配置，在manifest.json文件app-plus->distribute->apple->urlschemewhitelist节点下添加（如urlschemewhitelist:["iosamap","baidumap"]）  
			                plus.nativeUI.actionSheet({title:"选择地图应用",cancel:"取消",buttons:[{title:"Apple地图"},{title:"百度地图"},{title:"高德地图"}]}, function(e){  
			                    console.log("e.index: " + e.index);  
			                    switch (e.index){  
			                        case 1:  
			                            url = encodeURI("http://maps.apple.com/?q="+ vm.address +"&ll="+ vm.endlat +","+ vm.endlng +"&spn=0.008766,0.019441");  
			                            break;  
			                        case 2:  
			                            url = encodeURI("baidumap://map/marker?location="+ vm.endlat +","+ vm.endlng +"&title="+ vm.address +"&src=Hello%20uni-app");  
			                            break;  
			                        case 3:  
			                             url = encodeURI("iosamap://viewMap?sourceApplication=Hello%20uni-app&poiname="+ vm.address +"&lat="+ vm.endlat +"&lon="+ vm.endlng +"&dev=0");  
			                            break;  
			                        default:  
			                            break;  
			                    }  
			                    if (url!="") {
									console.log(url)
			                        plus.runtime.openURL( url, function( e ) {  
			                            plus.nativeUI.alert(e.message);  
			                        });  
				  
			                    }  
			                })  
			            }  
			        }
		}
	}